Challenge: Acquire higher quality data and
for longer duration while conducting formation transient testing in highly
permeable formations than what conventional wireline formation testing tools
can achieve and concurrently significantly improve efficiency while reducing
testing costs.
Solution: Develop formation testing while
tripping (FTWT) technology, which enables conducting interval pressure
transient testing (IPTT) at flow rates up to 130 cm3/s [0.05 bbl/min] to extend
the evaluation of reservoir properties to hundreds of meters beyond the
wellbore while consistently keeping the well in overbalance as all extracted
hydrocarbons are circulated out during the test.
Results: Confirmed a radial flow pattern from
a 6-hour test that investigated 576 m into an 11-darcy-permeability sandstone
where a conventional IPTT would have achieved only a 200-m radius of
investigation.